This patch adds the network tester for simple and garnet networks.

The tester code is in testers/networktest.
The tester can be invoked by configs/example/ruby_network_test.py.
A dummy coherence protocol called Network_test is also addded for network-only simulations and testing. The protocol takes in messages from the tester and just pushes them into the network in the appropriate vnet, without storing any state.

1 files changed, 158 insertions, 0 deletions

diff --git a/src/cpu/testers/networktest/networktest.hh b/src/cpu/testers/networktest/networktest.hh
new file mode 100644
index 000000000..923f47df2
--- /dev/null
+++ b/src/cpu/testers/networktest/networktest.hh
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2009 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Tushar Krishna
+ */
+
+#ifndef __CPU_NETWORKTEST_NETWORKTEST_HH__
+#define __CPU_NETWORKTEST_NETWORKTEST_HH__
+
+#include <set>
+
+#include "base/statistics.hh"
+#include "base/fast_alloc.hh"
+#include "params/NetworkTest.hh"
+#include "sim/eventq.hh"
+#include "sim/sim_exit.hh"
+#include "sim/sim_object.hh"
+#include "sim/stats.hh"
+#include "mem/mem_object.hh"
+#include "mem/port.hh"
+
+class Packet;
+class NetworkTest : public MemObject
+{
+  public:
+    typedef NetworkTestParams Params;
+    NetworkTest(const Params *p);
+
+    virtual void init();
+
+    inline Tick ticks(int numCycles) const { return numCycles; }
+
+    // main simulation loop (one cycle)
+    void tick();
+
+    virtual Port *getPort(const std::string &if_name, int idx = -1);
+
+    /**
+     * Print state of address in memory system via PrintReq (for
+     * debugging).
+     */
+    void printAddr(Addr a);
+
+  protected:
+    class TickEvent : public Event
+    {
+      private:
+        NetworkTest *cpu;
+
+      public:
+        TickEvent(NetworkTest *c) : Event(CPU_Tick_Pri), cpu(c) {}
+        void process() { cpu->tick(); }
+        virtual const char *description() const { return "NetworkTest tick"; }
+    };
+
+    TickEvent tickEvent;
+
+    class CpuPort : public Port
+    {
+        NetworkTest *networktest;
+
+      public:
+
+        CpuPort(const std::string &_name, NetworkTest *_networktest)
+            : Port(_name, _networktest), networktest(_networktest)
+        { }
+
+        bool snoopRangeSent;
+
+      protected:
+
+        virtual bool recvTiming(PacketPtr pkt);
+
+        virtual Tick recvAtomic(PacketPtr pkt);
+
+        virtual void recvFunctional(PacketPtr pkt);
+
+        virtual void recvStatusChange(Status status);
+
+        virtual void recvRetry();
+
+        virtual void getDeviceAddressRanges(AddrRangeList &resp,
+                                            bool &snoop)
+        { resp.clear(); snoop = false; }
+    };
+
+    CpuPort cachePort;
+
+    bool snoopRangeSent;
+
+    class NetworkTestSenderState : public Packet::SenderState, public FastAlloc
+    {
+      public:
+        /** Constructor. */
+        NetworkTestSenderState(uint8_t *_data)
+            : data(_data)
+        { }
+
+        // Hold onto data pointer
+        uint8_t *data;
+    };
+
+    PacketPtr retryPkt;
+    bool accessRetry;
+    unsigned size;
+    int id;
+
+    unsigned blockSizeBits;
+
+    Tick noResponseCycles;
+
+    int numMemories;
+    bool fixedPkts;
+    int maxPackets;
+    int numPacketsSent;
+
+    int trafficType;
+    double injRate;
+    int precision;
+
+    void completeRequest(PacketPtr pkt);
+
+    void generatePkt();
+    void sendPkt(PacketPtr pkt);
+
+    void doRetry();
+
+    friend class MemCompleteEvent;
+};
+
+#endif // __CPU_NETWORKTEST_NETWORKTEST_HH__
+
+
+